When and why he came here ________ yet.A.is not known B.are not known C.has not known D.have n

When and why he came here ________ yet.A.is not known B.are not known C.has not known D.have n
When and why he came here ________ yet.
A.is not known B.are not known
C.has not known D.have not been
那个正确,为什么
英语人气:637 ℃时间:2019-10-18 03:06:26
优质解答
A.is not known
When and why he came here
这是一个主语从句,看成是单数的主语
我来回答
类似推荐
请使用1024x768 IE6.0或更高版本浏览器浏览本站点,以保证最佳阅读效果。本页提供作业小助手,一起搜作业以及作业好帮手最新版!
版权所有 CopyRight © 2012-2024 作业小助手 All Rights Reserved. 手机版